Karin Greimel Roderick Bloem Barbara Jobstmann Moshe Y. Vardi 361-372 2008 ICALP (2) http://dx.doi.org/10.1007/978-3-540-70583-3_30 conf/icalp/2008-2 db/conf/icalp/icalp2008-2.html#GreimelBJV08